What is the range of this, and how big of an object does it take to trigger it?

The range is 0.1 to 12 meters. The second part of your question is difficult to answer since it would depend on factors such as the reflectivity of the object and distance from the lidar. Be aware that this product does not perform well in bright sunlight.

Does it come with a USB adapter?

No, it does not. But you could use an arduino as a USB interface

Are there any arduino library & example available for the TFmini Plus?

Document link https://github.com/TFmini

Can this unit be used in a large water tank (10m high), to measure distance from the top of the tank to water level? Will laser beam reflect properly?

This device uses infrared laser. I am not sure how much reflection can be in the surface of clear transparent water. I think it would be minimum and that will be bad for the measurement. I would go for an ultrasound sensor instead.

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Stemedu TFmini Plus LiDAR Range Finder Sensor, 0.1–12m Distance Detection Module with 5mm Resolution, 1000Hz Frame Rate, UART & I2C, IP65 Waterproof/Dustproof for Arduino Drone Robot Vacuum

Product ID: 116536585

💧IP65 Waterproof

📏Range: 0.1m~12m

🔍Resolution: 5mm

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RM396

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Sold byAmazon MalaysiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Elevate Your Sensing Game!

DRONE READY - Vibration-tested for stability, making it ideal for aerial applications.
BUILT TO LAST - IP65 rated for dust and water resistance, perfect for any environment.
HIGH FRAME RATE - Enjoy rapid data processing with a frame rate of 1000Hz.
VERSATILE COMPATIBILITY - Seamlessly switch between UART and I2C interfaces for ultimate flexibility.
PRECISION AT YOUR FINGERTIPS - Experience distance detection with a resolution of just 5mm.

The TFmini Plus Micro Range Finder Sensor is a cutting-edge LiDAR distance detection module designed for Arduino applications. With an operating range of 0.1m to 12m and a resolution of 5mm, it offers precise measurements. Its IP65 enclosure ensures durability against dust and water, while compatibility with UART and I2C interfaces provides versatility for various projects. With a high frame rate of 1000Hz and vibration resistance, it's perfect for both stationary and drone applications.

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